Thermal decomposition oilification method and thermal decomposition oilification device for waste plastics, and fcc catalyst

Abstract

The waste plastics thermal decomposition oilification method comprises: a step of heating waste plastics and a polymerization inhibitor, vaporizing the polymerization inhibitor, and thermally decomposing the waste plastics to produce a decomposed gas such that the polymerization inhibitor is caused to react with the decomposed gas in a gas phase; and a step of cooling the decomposed gas to produce a decomposed oil. As a result, the decomposed oil is not transformed to heavier components when the decomposed oil is produced. Therefore, the transformation of the decomposed oil to heavier components can be prevented even if waste plastics are thermally decomposed without separating them into an aliphatic type and an aromatic styrene type.

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         12 . A fluid catalytic cracking catalyst comprising a polymerization inhibitor. 
     
     
         13 . The fluid catalytic cracking catalyst according to  claim 12 , further comprising
 a base body that retains a main component of the catalyst, wherein   a surface of the base body is coated with the polymerization inhibitor.   
     
     
         14 . The fluid catalytic cracking catalyst according to  claim 12 , wherein
 the polymerization inhibitor is a quinone-based polymerization inhibitor including hydroquinone.   
     
     
         15 . A waste plastics thermal decomposition oilification method comprising:
 heating waste plastics and the fluid catalytic cracking catalyst according to  claim 12 , vaporizing the polymerization inhibitor of the fluid catalytic cracking catalyst, and thermally decomposing the waste plastics by causing the waste plastics to contact with the fluid catalytic cracking catalyst to produce a decomposed gas such that the polymerization inhibitor is caused to react with the decomposed gas in a gas phase; and   cooling the decomposed gas to produce a decomposed oil.   
     
     
         16 . The waste plastics thermal decomposition oilification method according to  claim 15 , further comprising:
 supplying the waste plastics to a decomposition and evaporation reservoir;   supplying the fluid catalytic cracking catalyst with the polymerization inhibitor to the decomposition and evaporation reservoir from a catalyst tank housing the fluid catalytic cracking catalyst with the polymerization inhibitor, wherein   the heating comprises heating the waste plastics and the fluid catalytic cracking catalyst with the polymerization inhibitor.   
     
     
         17 . A waste plastics thermal decomposition oilification apparatus comprising:
 a decomposition and evaporation reservoir configured to heat waste plastics and the fluid catalytic cracking catalyst according to  claim 12 , vaporize the polymerization inhibitor of the fluid catalytic cracking catalyst, and thermally decompose the waste plastics by causing the waste plastics to contact with the fluid catalytic cracking catalyst to produce a decomposed gas such that the polymerization inhibitor is caused to react with the decomposed gas in a gas phase; and   a condenser connected to the decomposition and evaporation reservoir, and configured to cool the decomposed gas supplied from the decomposition and evaporation reservoir to produce a decomposed oil.   
     
     
         18 . The waste plastics thermal decomposition oilification apparatus according to  claim 17 , further comprising
 a raw material reservoir connected to the decomposition and evaporation reservoir, and configured to store the waste plastics, and supply the waste plastics to the decomposition and evaporation reservoir.   
     
     
         19 . The waste plastics thermal decomposition oilification apparatus according to  claim 17 , further comprising
 a catalyst tank connected to the decomposition and evaporation reservoir, and configured to accommodate the fluid catalytic cracking catalyst with the polymerization inhibitor, and supply the fluid catalytic cracking catalyst with the polymerization inhibitor to the decomposition and evaporation reservoir.